[DO NOT MERGE] rbd: bump RBD_MAX_PARENT_CHAIN_LEN to 128

Bump RBD_MAX_PARENT_CHAIN_LEN from 16 to 128 to avoid fsx failures.

(The alternative is changing fsx to flatten unconditionally when the
limit of 16 is reached, which is ugly and not needed for librbd.)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index af0e21149dbc9e2230ccdc624ae3616448c23d51..f8142d6fbd154ca1a2923db47326e58f03078c4b 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -89,7 +89,7 @@ static int atomic_dec_return_safe(atomic_t *v)
 #define RBD_MINORS_PER_MAJOR           256
 #define RBD_SINGLE_MAJOR_PART_SHIFT    4
 
-#define RBD_MAX_PARENT_CHAIN_LEN       16
+#define RBD_MAX_PARENT_CHAIN_LEN       128
 
 #define RBD_SNAP_DEV_NAME_PREFIX       "snap_"
 #define RBD_MAX_SNAP_NAME_LEN  \